A little info about the Montreux releases from one of their press releases many years ago.....

Through an exclusive partnership with Montreux Sounds, Eagle Rock Entertainment is making highlights of the Festival's performances available for the first time for worldwide television broadcast as part of its "Live at Montreux" series.

Eagle Rock also has an exclusive agreement with Montreux Sounds for access to its Festival archives, including shows dating back to the 1960s. With permission from the artists and their record companies, many of these performances are being released on DVD and CD. Eagle Rock's "Live at Montreux" DVD/CD series debuted in November 2004 and has captured major artists at critical junctures of their careers (Bonnie Raitt), crowd favorites delivering classic sets (Earth Wind & Fire, Chic), and seminal artists that are no longer with us performing their greatest works (Johnny Cash, Marvin Gaye). Many performances are recorded in High Definition, and are available in stereo, 5.1 surround and DTS audio.